Fish Face's fortress is the interior of the murderous fish-like mutant named Fish Face (Christian Lanz), which serves as his secret hideout and hidden citadel. This battle arena made its first debut in My Little Pony: Broken Harmonies.
This battle arena has a pet store-like appearance with a display containing the weaponry and equipment of the late Fish Face.
This battle arena has five arena interactions. From farthest left to right, they are:
- An empty fishbowl that can be thrown at the opponent with it.
- A cookie jar filled with tarantula, which can be thrown at the opponent with it.
- A ceiling fan that can be used to jump kick the opponent multiple times.
- A chandelier that can be used to jump kick the opponent multiple times.
- A baseball bat that can be used to bash the opponent's head with it.